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A047884 as a simple table

na(n)
11
21
31
41
52
61
71
85
93
101
111
129
1311
144
151
161
1719
1831
1919
205
211
221
2334
2492
2569
2629
276
281
291
3069
31253
32265
33127
3441
357
361
371
38125
39709
40929
41583
42209
4355
448
451
461
47251
481936
493356
502446
511106
52319
5371
549
551
561
57461
585336
5911626
6010484
615323
621904
63461
6489
6510
661

[1,1,1,1,2,1,1,5,3,1,1,9,11,4,1,1,19,31,19,5,1,1,
 34,92,69,29,6,1,1,69,253,265,127,41,7,1,1,125,709,
 929,583,209,55,8,1,1,251,1936,3356,2446,1106,319,
 71,9,1,1,461,5336,11626,10484,5323,1904,461,89,10,
 1]